428666894867 has 4 divisors (see below), whose sum is σ = 428668694856. Its totient is φ = 428665094880.

The previous prime is 428666894837. The next prime is 428666894891. The reversal of 428666894867 is 768498666824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428666894867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428666894794 and 428666894803.

It is not an unprimeable number, because it can be changed into a prime (428666894837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476273 + ... + 1041234.

It is an arithmetic number, because the mean of its divisors is an integer number (107167173714).

Almost surely, 2^428666894867 is an apocalyptic number.

428666894867 is a deficient number, since it is larger than the sum of its proper divisors (1799989).

428666894867 is a wasteful number, since it uses less digits than its factorization.

428666894867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799988.

The product of its digits is 1337720832, while the sum is 74.

The spelling of 428666894867 in words is "four hundred twenty-eight billion, six hundred sixty-six million, eight hundred ninety-four thousand, eight hundred sixty-seven".